Pet playpen



FIG. 1 is a perspective view of a pet playpen, showing our new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is an enlargement view of FIG. 1 .

The dot-dashed broken lines represent the boundary of the enlargedportion and form no part of the claimed design.

CLAIM The ornamental design for a pet playpen, as shown and described.